Safety-valve.



N. GOODYEAR. SAFETY VALVE. APPLIOATION FILED JAN. 15, 1910.

985, 1 60. Patented Feb. 28, 19114 IE-immerses 7 5] vwa wloz 351;; Q-Hozmmg I 4 w M WM w new and useful Improvements in Safet v-.

UNITED STATES PATENT orricn LIELsoNeoonYEAn, or new YORK, N. Y., essrsnon T0 MAINE DEVELOPMENT CORPORATION, A CORPORATION or MAINE.

sArErY-vALvE.

Patented Feb. 2s, 1911.

Application filed January 15,1910. SeriaI'No; 538,200.

To allywho'm it may concern:

Be it known that I, N ELsoN'GoonrnAR, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain Valves, of which the following is a specification accompanied by drawings.v

This invention-relates to hydraulic back pressure or safety valves through which'gas or other fluid, for example acetylene or oxygen, may be passed in one direction only, and the objects of the invention are to simplify the construction of such devices, reduce the cost of manufacture, and obtain certain and efficient operation.

One of the preferred embodiments of the invention is described and claimed in this specification and shown in the accompanying drawing, which is a vertical sectional View of the safety valve constructed in ac cordance with the invention.

Referring to the drawings, A represents an outer casing, B represents an'inner container or casing, both adapted to contain water, substantially the normal water levels being shown in the drawing. The outer casing may be provided with the water outlet 0 and the overflow D normally both closed. The inner casing or container communicates with the outer casing as by means of the opening E in the bottom F. Around the opening E is preferably arranged an annular piece G upon which is placed the rubber valve seat or ring H held in place by the washer J and bolts K.

Within the inner container B is a float L provided with a lower valve stem 0 having the valve P cooperating with the valve seat H. The lower end of the stem 0 is preferably guided in the guide Q. A deflector plate R is supported between the float L and the valve P as by'means of the rods S connected to the sides of the inner container as by means'of the brackets T. Supported by The outer casing A is preferably closed by the frame or casting Z which is provided with the gas inlet a to which the inlet pipe Z is connected. The casting in this 1nor casting Z and held in provided with the outlet '0 to eduction pipe cl is connected.

stance is also which the gas The inlet pipe 6 communicates with they.

space between the outer and inner casings,

while the outlet the inner casing.

A cover plate 6 is mounted on the frame place by the bolts f. Between the cover plate e and frame Z is provided the gasket 9. The cover plate 6 is provided "with the escape vent 71. having a rubber valve seat j held in place by the washer is and bolts 0. The valve Y cotiperates with the valve seat j. The cover plate 6, shown, is also provided with the escape pipe 2? entering at one side of the cap portion 1 of the plate 0. Nithin the cap portion q and around the opening 72. is the upwardly extending flange 1" around which is seated a removable cap 8 water sealed as shown in the drawing. The upper end of the valve stem X is guided in the guide 2?. A; bail u as shown is pivoted to the cap portion (7 of pipe cZ communicates with the cover plate and is adapted to hold in place the cover 1) by means of the hand screw to.

In theoperation of the apparatus, gas or other fluid under pressure enters the inlet pipe b and passes downwardly in "the direction of the arrows between the casings A and B. The valve P is normally open and the valve Y is normally closed by the buoyancy of the float L. The gas bubbles up through the lower valve opening'and rising through the filter V passes out through the eduction pipe at. If for anyreason there should be a back pressure through the pipe 61?, the pressure of the entering gas will be overcome in the inner container B due to the back pressure and the difference in head betweenthe water levels in the outer and inner casings, so that the float L will be depressed andthe lower valve P will be closed and the upper valve Y open, so that the gas will escape through the upper valve opening and through the escape pipe 79. When the back pressure is relieved the float will again rise and will close the upper valve Y and open the lower valve P.

By opening the cover a, leakage at the upper valve Y may be detected by the pres ence of gas bubbles rising around the cap 8, even when too slight to readily detect at pipe 19.

It will be seen that the two casings'coning with'each stitute connecting chambers the 'connection,

between which is controlled by the valve and float by means'of the body of liquid in the chambers. V v

I A claim and desire to obtain bY Lette'rS' Patentthe following;

1. A hydraulic back pressure valve, comprising'outer andinner casings communicat; other, a valve-for controlling said communication, an. escape vent'and valve for the, inner casing, means for, automatically opening one 'valvewhen the bther is closed, andvconnections. for pass ng gas through said casings in one direction.

' ated 2; A hydraulic back prising an outer casing an' inner container and commumcating' with the. outer casing through an opening in the bottom ofthe container, a cover having anesca e vent, a float in said container and valves a ternately controlling said opening in the container and the escape vent and actu-- by said float.

'3. A hydraulic back pressure valve, comprising inner and outer casings adapted to holdiwater, said inner casing having a valve vconnection between ,inthe inner casing, a

-. closed and the bottom valve open,

for admitting gas to the outer casing and mally passes, a

controlled opening in its bottom,,and a valve controlled escape vent above the water level float'in the inner casing adapted to normally hold the vent valve and means contain liquid :mally passes, a

prising two I connection between them and adapted to pressure valve, com-- havingv agas inlet,- havinga gas outlet the bottom of scarce prising two chambers or "casings having a connection between them and adapted to contain liquid through which the gas ncr-' float actuated by the liquid,

two valves actuated the said float, one of which control the said connection between the chambers or casings and two gas outlets from one of'said chambers one of which out-' lets is'control-led by the other of said valves. A hydraulic back pressure valve com hambers or casings having a contain-liquid through which the gas normally passes, afloat actuated by the liquid and a valve controllinthe said connection and actuated by the sand float.

7. A hydraulic back pressure valve comprising two chambers or casings adapted to hold liquid, a valve and valve controlled opening or connection between them through which the liquid acts and through which the gas passes, a fioat'in one of the chambers,

connections therefrom tothe said valve for normally holding the said valve open, means for adnntting gas .to one of the chambers and deducting it from the other chamber,

and a valve and valve controlled vent for the last said chamber actuated by the said float and normally closed.

8. A hydraulic back pressure valve having two chambers adapted to hold liquid an opening or connection between them, a valve therefor, a float controlling the valve, and a deflector plate R- supported "between the valve and the float.

In testimony whereof I have signed this specification in the presence of two subscribing 'witnesses, J an. 14, 1910.

NELSON GOODYEAR.

Witnesses:

E. P. LA GAY, E. VAN ZANDT. 

